Flint Ridge is a deposit of flint approximately 3 x 9 miles running in an East-West orientation. The layer is 2 - 10 feet thick. More than 10,000 years ago, Native Americans quarried the flint from pits still visible on the quarry trail. They fashioned many different types of stone tools from this material including knives, spearpoints, and arrowheads. Flint was vital to their survival. An excavated pit can been seen inside the museum.